148 entries under dull topic. ×

9
quiet(adjective, easy, slow, heavy)
9
supine(adjective, quiet, easy, slow)
8
bored(adjective, beat, weary, tired)
8
dead(adjective, beat, moderate, low)
8
heavy(adjective, quiet, easy, slow)
8
hypnotic(adjective, tired, inactivity, awareness)
8
languid(adjective, slow, careless, relaxed)
8
languorous(adjective, slow, careless, relaxed)
8
lazy(adjective, slow, relaxed, deliberate)
7
idle(adjective, quiet, flat, careless)
6
sleeping(adjective, tired)
6
debilitated(adjective, stupid, idle, weary)
6
out(adjective, quiet, informal, cold)
6
passive(adjective, quiet, careless, heavy)
6
yawning(adjective, tired)
5
indolent(adjective, quiet, easy, careless)
5
lackadaisical(adjective, quiet, easy, slow)
4
limp(adjective, slow, relaxed, still)
4
motionless(adjective, quiet, flat, indifferent)
4
out of it(expression, adjective, idiom, quiet)
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APASmart Define. (2016). sleepy thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/sleepy/thesaurus/synonyms
ChicagoSmart Define. 2016. "sleepy thesaurus" https://smartdefine.org/sleepy/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, sleepy thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sleepy/thesaurus/synonyms>.
MLASmart Define. "sleepy thesaurus" 18 February 2016. Web. 27 September 2026. <https://smartdefine.org/sleepy/thesaurus/synonyms>